<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP
*
* This content is released under the MIT License (MIT)
*
* Copyright (c) 2014 - 2018, British Columbia Institute of Technology
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @package CodeIgniter
* @author EllisLab Dev Team
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
* @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/)
* @license http://opensource.org/licenses/MIT MIT License
* @link https://codeigniter.com
* @since Version 3.0.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');
/**
* PHP ext/standard compatibility package
*
* @package CodeIgniter
* @subpackage CodeIgniter
* @category Compatibility
* @author Andrey Andreev
* @link https://codeigniter.com/user_guide/
*/
// ------------------------------------------------------------------------
if (is_php('5.5')) {
return;
}
// ------------------------------------------------------------------------
if (!function_exists('array_column')) {
/**
* array_column()
*
* @link http://php.net/array_column
* @param array $array
* @param mixed $column_key
* @param mixed $index_key
* @return array
*/
function array_column(array $array, $column_key, $index_key = NULL)
{
if (!in_array($type = gettype($column_key), array('integer', 'string', 'NULL'), TRUE)) {
if ($type === 'double') {
$column_key = (int)$column_key;
} elseif ($type === 'object' && method_exists($column_key, '__toString')) {
$column_key = (string)$column_key;
} else {
trigger_error('array_column(): The column key should be either a string or an integer', E_USER_WARNING);
return FALSE;
}
}
if (!in_array($type = gettype($index_key), array('integer', 'string', 'NULL'), TRUE)) {
if ($type === 'double') {
$index_key = (int)$index_key;
} elseif ($type === 'object' && method_exists($index_key, '__toString')) {
$index_key = (string)$index_key;
} else {
trigger_error('array_column(): The index key should be either a string or an integer', E_USER_WARNING);
return FALSE;
}
}
$result = array();
foreach ($array as &$a) {
if ($column_key === NULL) {
$value = $a;
} elseif (is_array($a) && array_key_exists($column_key, $a)) {
$value = $a[$column_key];
} else {
continue;
}
if ($index_key === NULL OR !array_key_exists($index_key, $a)) {
$result[] = $value;
} else {
$result[$a[$index_key]] = $value;
}
}
return $result;
}
}
// ------------------------------------------------------------------------
if (is_php('5.4')) {
return;
}
// ------------------------------------------------------------------------
if (!function_exists('hex2bin')) {
/**
* hex2bin()
*
* @link http://php.net/hex2bin
* @param string $data
* @return string
*/
function hex2bin($data)
{
if (in_array($type = gettype($data), array('array', 'double', 'object', 'resource'), TRUE)) {
if ($type === 'object' && method_exists($data, '__toString')) {
$data = (string)$data;
} else {
trigger_error('hex2bin() expects parameter 1 to be string, ' . $type . ' given', E_USER_WARNING);
return NULL;
}
}
if (strlen($data) % 2 !== 0) {
trigger_error('Hexadecimal input string must have an even length', E_USER_WARNING);
return FALSE;
} elseif (!preg_match('/^[0-9a-f]*$/i', $data)) {
trigger_error('Input string must be hexadecimal string', E_USER_WARNING);
return FALSE;
}
return pack('H*', $data);
}
}
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